LAST EDITED ON 03-28-02 AT 11:55 PM (EST)
Newsbin can't currently download an incomplete if part #1 is missing. The problem's that part #1 supplies both the filename and encoding type (MIME/UU/YENC). I suspect this will change later on.

You download incompletes by right clicking the post and selecting "Download Chunks Only".

Then you use the techniques described in "How to Sample VCD/MPG..." to assemble the partial file out of the spool directory.